Manchester United midfielder Mason Mount endured an unhappy return to Stamford Bridge to take on former club Chelsea. Chelsea fans made clear their displeasure with Mason Mount, booing his every touch of the ball at Stamford Bridge. Mount was introduced as a second half substitute, brought on with Manchester United 3-2 up. It looked like he was ready to pile it on. Disastrously, Manchester United blew it, losing 4-3 after conceding two stoppage time goals. READ MORE: Who is Mason Mount? Age, Height, Number, Salary, Net Worth Mason Mount return to Stamford Bridge in numbersMason Mount was intro…